Add release date of Rails 3.2.9 to documentation

Conflicts:
	actionpack/CHANGELOG.md
	activerecord/CHANGELOG.md
	activesupport/CHANGELOG.md
updating the changelog for the CVE
updating the changelogs
updating changelog
CVE-2012-5664 options hashes should only be extracted if there are extra parameters
Merge branch '3-2-sec' into 3-2-secmerge

* 3-2-sec:
  CVE-2012-5664 options hashes should only be extracted if there are extra parameters
  updating changelog
  updating the changelogs
  updating the changelog for the CVE
  Add release date of Rails 3.2.9 to documentation

Conflicts:
	actionmailer/CHANGELOG.md
	actionpack/CHANGELOG.md
	activemodel/CHANGELOG.md
	activerecord/CHANGELOG.md
	activeresource/CHANGELOG.md
	activesupport/CHANGELOG.md
	railties/CHANGELOG.md
Merge branch '3-2-stable' into 3-2-secmerge

* 3-2-stable:
  fix block.arity raise nil error when not given a block to "content_tag_for"
  removes the Ajax on Rails early draft
  Revert "Merge pull request #8665 from senny/8661_should_not_append_charset_if_already_present"
  backport #8662, charset should not be appended for `head` responses
  Revert "Fix `validates_presence_of` with `:allow_nil` or `:allow_blank` options."
  Fix `validates_presence_of` with `:allow_nil` or `:allow_blank` options.
  backport #8616, quote column names in generated fixture files